I'm buying a new iMac to replace another one (both have Leopard) which I'm giving to my father in law. I know that I can migrate information and apps to the new iMac but I would like to delete personal information, user info, and documents on the old iMac while keeping some of the application, iphoto picures, iWork, and Parallels etc. Would rather not do a complete clean install and reinstall everything. Is that my only option?
I would always do a fresh install. You never know what remaining data will cause any confusion in the future. I would not like to depend on any program, which itself rely on common rules, like e.g. just copy your home directory, skipping some temp or whatever.